The actress plays Cath Atwood on the ITV crime drama and told This Morning that the series creator Chris Chibnall has done a brilliant job at keeping everyone guessing – including the cast.

‘Chris is a great writer and he writes brilliant red herrings, brilliant little avenues that you go down and think, “oh god, it’s them, it’s got to be them”,’ she said on Monday’s programme during a behind-the-scenes set visit.

‘And then suddenly he whips you around and this takes you into a different direction.”